From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753308AbaD1GSP (ORCPT ); Mon, 28 Apr 2014 02:18:15 -0400 Received: from mail-pd0-f177.google.com ([209.85.192.177]:65266 "EHLO mail-pd0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753004AbaD1GSK (ORCPT ); Mon, 28 Apr 2014 02:18:10 -0400 From: Vivek Gautam To: linux-usb@vger.kernel.org, linux-samsung-soc@vger.kernel.org, kishon@ti.com Cc: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, gregkh@linuxfoundation.org, balbi@ti.com, kgene.kim@samsung.com, t.figa@samsung.com, k.debski@samsung.com, sylvester.nawrocki@gmail.com Subject: [PATCH v7 2/2] phy: exynos5-usbdrd: Add facility for VBUS supply Date: Mon, 28 Apr 2014 11:47:54 +0530 Message-Id: <1398665874-31238-2-git-send-email-gautam.vivek@samsung.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1398665874-31238-1-git-send-email-gautam.vivek@samsung.com> References: <1398665874-31238-1-git-send-email-gautam.vivek@samsung.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adding support to enable/disable VBUS controlled by a regulator, to enable vbus supply on the port. Signed-off-by: Vivek Gautam --- Changes from v6: - Rebased on top of [PATCH v7 1/2] phy: Add new Exynos5 USB 3.0 PHY driver. drivers/phy/phy-exynos5-usbdrd.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/phy/phy-exynos5-usbdrd.c b/drivers/phy/phy-exynos5-usbdrd.c index bc381e3..6e8540e 100644 --- a/drivers/phy/phy-exynos5-usbdrd.c +++ b/drivers/phy/phy-exynos5-usbdrd.c @@ -23,6 +23,7 @@ #include #include #include +#include /* Exynos USB PHY registers */ #define EXYNOS5_FSEL_9MHZ6 0x0 @@ -170,6 +171,7 @@ struct exynos5_usbdrd_phy { } phys[EXYNOS5_DRDPHYS_NUM]; u32 extrefclk; struct clk *ref_clk; + struct regulator *vbus; }; static inline @@ -438,6 +440,7 @@ static int exynos5_usbdrd_phy_exit(struct phy *phy) static int exynos5_usbdrd_phy_power_on(struct phy *phy) { + int ret; struct phy_usb_instance *inst = phy_get_drvdata(phy); struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst); @@ -445,10 +448,24 @@ static int exynos5_usbdrd_phy_power_on(struct phy *phy) clk_prepare_enable(phy_drd->ref_clk); + /* Enable VBUS supply */ + if (phy_drd->vbus) { + ret = regulator_enable(phy_drd->vbus); + if (ret) { + dev_err(phy_drd->dev, "Failed to enable VBUS supply\n"); + goto fail_vbus; + } + } + /* Power-on PHY*/ inst->phy_cfg->phy_isol(inst, 0); return 0; + +fail_vbus: + clk_disable_unprepare(phy_drd->ref_clk); + + return ret; } static int exynos5_usbdrd_phy_power_off(struct phy *phy) @@ -461,6 +478,10 @@ static int exynos5_usbdrd_phy_power_off(struct phy *phy) /* Power-off the PHY */ inst->phy_cfg->phy_isol(inst, 1); + /* Disable VBUS supply */ + if (phy_drd->vbus) + regulator_disable(phy_drd->vbus); + clk_disable_unprepare(phy_drd->ref_clk); return 0; @@ -583,6 +604,17 @@ static int exynos5_usbdrd_phy_probe(struct platform_device *pdev) return ret; } + /* Get Vbus regulator */ + phy_drd->vbus = devm_regulator_get(dev, "vbus"); + if (IS_ERR(phy_drd->vbus)) { + ret = PTR_ERR(phy_drd->vbus); + if (ret == -EPROBE_DEFER) + return ret; + + dev_warn(dev, "Failed to get VBUS supply regulator\n"); + phy_drd->vbus = NULL; + } + dev_vdbg(dev, "Creating usbdrd_phy phy\n"); for (i = 0; i < EXYNOS5_DRDPHYS_NUM; i++) { -- 1.7.10.4